Crystal structures and spectroscopic characterization of MBr2 (CNXyl)n (M = Fe and Co, n = 4; M = Ni, n = 2; Xyl = 2,6-dimethylphenyl), and of formally zero-valent iron as a cocrystal of Fe(CNXyl)5 and Fe2 (CNXyl)9

Acta Crystallographica. Section C, Structural Chemistry
William W BrennesselJohn E Ellis

Abstract

Structures and spectroscopic characterization of the divalent complexes cis-dibromidotetrakis(2,6-dimethylphenyl isocyanide)iron(II) dichloromethane 0.771-solvate, [FeBr2(C9H9N)4]·0.771CH2Cl2 or cis-FeBr2(CNXyl)4·0.771CH2Cl2 (Xyl = 2,6-dimethylphenyl), trans-dibromidotetrakis(2,6-dimethylphenyl isocyanide)iron(II), [FeBr2(C9H9N)4] or trans-FeBr2(CNXyl)4, trans-dibromidotetrakis(2,6-dimethylphenyl isocyanide)cobalt(II), [CoBr2(C9H9N)4] or trans-CoBr2(CNXyl)4, and trans-dibromidobis(2,6-dimethylphenyl isocyanide)nickel(II), [NiBr2(C9H9N)2] or trans-NiBr2(CNXyl)2, are presented. Additionally, crystals grown from a cold diethyl ether solution of zero-valent Fe(CNXyl)5 produced a structure containing a cocrystallization of mononuclear Fe(CNXyl)5 and the previously unknown dinuclear [Fe(CNXyl)3]2(μ2-CNXyl)3, namely pentakis(2,6-dimethylphenyl isocyanide)iron(0) tris(μ2-2,6-dimethylphenyl isocyanide)bis[tris(2,6-dimethylphenyl isocyanide)iron(0)], [Fe(C9H9N)5][Fe2(C9H9N)9]. The (M)C-N-C(Xyl) angles of the isocyanide ligand are nearly linear for the metals in the +2 oxidation state, for which the ligands function essentially as pure donors. The νCN stretching frequencies for these divalent metal isocyanides are at or above that of the ...Continue Reading

References

Aug 29, 2002·Journal of the American Chemical Society·William W BrennesselVictor G Young
Dec 20, 2002·Angewandte Chemie·William W BrennesselJohn E Ellis
Dec 8, 2006·Angewandte Chemie·William W Brennessel, John E Ellis
Dec 25, 2007·Acta Crystallographica. Section A, Foundations of Crystallography·George M Sheldrick
Jan 28, 2009·Acta Crystallographica. Section D, Biological Crystallography·Anthony L Spek
Aug 11, 2012·Inorganic Chemistry·William W Brennessel, John E Ellis
Dec 30, 2014·Acta Crystallographica. Section A, Foundations and Advances·George M Sheldrick
Jan 9, 2015·Acta Crystallographica. Section C, Structural Chemistry·George M Sheldrick
Jan 9, 2015·Acta Crystallographica. Section C, Structural Chemistry·Anthony L Spek
Sep 19, 2018·Angewandte Chemie·Nada Y TashkandiKim M Baines

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